Halotestin
How to Report an Adverse Reaction to a Medication »
"Potential drug treatments are tested on paper, in laboratories and eventually in thousands of people. But every drug that goes through this cycle – every drug that FDA approves – carries some risk. One of the first lines of defense against "...
Read the How to Report an Adverse Reaction to a Medication article »
Halotestin
SIDE EFFECTS
Endocrine and urogenital
Female: the most common side effects of androgen therapy are amenorrhea and other menstrual irregularities; inhibition of gonadotropin secretion; and virilization, including deepening of the voice and clitoral enlargement. The latter usually is not reversible after androgens are discontinued. When administered to a pregnant woman, androgens can cause virilization of external genitalia of the female fetus.
Male: Gynecomastia, and excessive frequency and duration of penile erections. Oligospermia may occur at high dosage.
Skin and appendages
Hirsutism, male pattern of baldness, seborrhea, and acne.
Fluid and electrolyte disturbances
Retention of sodium, chloride, water, potassium, calcium, and inorganic phosphates.
Gastrointestinal
Nausea, cholestatic jaundice, alterations in liver function tests, rarely hepatocellular neoplasms and peliosis hepatis (See WARNINGS).
Hematologic
Suppression of clotting factors II, V, VII, and X, bleeding in patients on concomitant anticoagulant therapy, and polycythemia.
Nervous system
Increased or decreased libido, headache, anxiety, depression, and generalized paresthesia.
Allergic
Hypersensitivity, including skin manifestations and anaphylactoid reactions.
Drug Abuse And Dependence
Controlled Substance Class: Fluoxymesterone is a controlled substance under the Anabolic Steroids Control Act, and HALOTESTIN (fluoxymesterone) Tablets has been assigned to Schedule III.
Read the Halotestin (fluoxymesterone) Side Effects Center for a complete guide to possible side effects »
DRUG INTERACTIONS
Androgens may increase sensitivity to oral anticoagulants. Dosage of the anticoagulant may require reduction in order to maintain satisfactory therapeutic hypoprothrombinemia.
Concurrent administration of oxyphenbutazone and androgens may result in elevated serum levels of oxyphenbutazone.
In diabetic patients, the metabolic effects of androgens may decrease blood glucose and, therefore, insulin requirements.
Drug/Laboratory test interferences
Androgens may decrease levels of thyroxine-binding globulin, resulting in decreased total T4 serum levels and increased resin uptake of T3 and T4. Free thyroid hormone levels remain unchanged, however, and there is no clinical evidence of thyroid dysfunction.
Last reviewed on RxList: 10/14/2008
This monograph has been modified to include the generic and brand name in many instances.
Additional Halotestin Information
Halotestin - User Reviews
Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
Women's Health
Find out what women really need.






